Spool



E. J. HUBBARD.

SPOOL.

APPLlcATgAoN FILED MAY 29, |920.

1,365,406. Patented 1111.111921.

UNITED STATES EBERJ. HUBBARD, OF BERWYN, ILLINOIS.

srooI-i.

Specication of Letters Patent.

Patented Jan. 11, 1921.

Appication filed May 29, 1920. Serial No. 385,101.

To all whom t may con/:em:

Be it known that I, EBER J. HUBBARD, a citizen of the United States, anda resident of Berwyn, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Spools, of which thefollowing is a specification.

My invention relates to spools constructed either entirely or in greaterpart of sheet metal and of such shape and dimensions as to beinterchangeable with the ordinary wooden spools heretofore used forholding fine insulated wire or other delicate materials.v

FVooden spools are rapidly giving way to sheet metal spools. There aresheet metal spools on the market intended for .holding wire, but suchspools are not practlcal for holding magnet wire or other fine insulatedwire for the reason that -the ends of the spools are thin thuspermitting them to telescope one with another and chafe or cut theinsulation and even the wire itself. Neither do the spools of the priorart possess the re quired rigidity and strength necessary for holding upunder rough usage the spools are apt to receive during winding orunwinding of wire or during shipping or handling thereof. The importantobject of my invention is therefore to provide strong and rigid end wallconstruction and connection thereof with the spool body, and end wallsof suhcientwidth to prevent bending thereof and therefore telescopicengagement of one spool with another, thus protecting wire on the spoolsagainst chafing or cutting.

The above and other, features of my invention are clearly disclosed inthe structure shown on the accompanying drawings in which:

Figure 1, is a side elevational view partly in vertical diametralsection:

Fig. 2, is an end view partly in section on line 2 2 of Fig. 1, and

Fig. 3, is a side elevational view partly in vertical section showing amodified arrangement.

'The hub 5 of the spool is formed from a rectangular blank of sheetmetal rolled to cylindrical form and with its edges connected togetherby means of tongues 6 on one edge engaging in dovetail grooves 7 in theopposite edge. Extending from the ends of the hub are the tongues 8which project through the slots 9 formed in the circular end disks orwalls 10, the tongues after insertion through the Slots being deflectedradially against the outside of the end walls as clearly shown.Extending axially through the hub is the cylindrical core 11 also formedof sheet metal, the core ends extending through the openings 12 in theend walls 10 and the material adjacent such openings being deflectedoutwardly to form cylindrical flanges 13 for receiving the core, theseflanges being preferably spot-welded against the core.

The outer peripheral section of each end wall 10 is spun or otherwisedeflected outwardly to form the cylindrical flange seetion 14 forreceiving ller material 15 which filler material may be in the form ofav wood block, or of paper, mill-board, composition or other material,and may be treated with protective water-proofing, lire-proong or othermaterial. Each filler block has the center opening 16 for receivingtherespective end of the core. After insertion of a filler block theperipheral edge 17 of the flange 14 is deflected radially inwardlyagainst the outside of the filler block and the outer end of the core isflared outwardly as indicated at 18, the filler material being thussecurely clamped at its periphery against the respective end wall 10 bythe inturned edge 17 and at its center being firmly held against the endwall by the flared end 18 of the core. A very rigid structure is thusformed. The tongues 8 may be s ot-welded against the respective wall 10fiut such spot-welding is reall unnecessary as the tongues are so secure y clamped against the end walls by the filler material, the tonguessinking into the filler material under the pressure and being thussecurely embedded therein and held thereby. 4The inturned edges 17 forma guard to prevent chafing of the filler material when the spool is seton end and the flared ends of the core serve also to permit the spool tobe vreadily applied to a spindle.

The filler material gives considerable width to the end structures andsuch structures are so rigid and so securely connected with the hub andcore that it is impossible for spools to telescope. Even if the ends ofa spool should bear against the wire on another spool, the rims orflanges 14 are of such width that the insulation would not be injured.In forming the ends care is taken to sufficiently round the corners sothat it will beim ossible for them to cut or scratch.

In ig. 3, I have shown a modified 8.1'-

V filler frame is of sheet metal as just de rangement. Instead ofinserting non-metallic'filler material, the filler structure 19 isconstructed of sheet metal comprising a wall having the outer flange 20and the 'inner flange 21.y The outer flange fits within the flange 14 ofthe spool side-walls 10 and the inner flange fit the core. Afterinsertion of the filler frame the peripheral section 17 of the rim 14and the end 18 of the core are deflected in the same manner as in thestructure shown in Fig. l. Where the scribed the tongues 8 arepreferably spotwelded to the end walls l0.

I thus produce a spool which is especially adapted for holding fineinsulated wire and.-

which has all the advantages of wooden spools and a great manyadditional advantages. They are of course of much greater strength thanthe all wooden spools and are very light. Owing to the improvedconstruction of the end structure the spools cannot telescope andthewire supported thereon is therefore fully protected.

Having described my invention'I claim as follows:

1. In a spool of the class described, the combination of a hub, a coreof sheet metal, end walls havin walls lreceiving t 1e core cnds throughtheir openings and being secured to the ends of the hub, and fillermaterial surrounding the projecting ends of said core, the peripheralsections of said walls being deflected outwardly and downwardly toinclose the peripheral section of said filler material and the outerends of said core being flared thereby to rivet said filler materialagainst the end walls around the end wall openings.

2. A spool of the class described comprising a sheet metal hub havingtongues at its ends, and walls having slots for receiving said tongues,said tongues extendin through said slots and deflected radial y againstthe out-side of said walls, said walls having axial openings, a sheetmetal core extending through said openings and through said hub, theperipheral sections of said end walls being' deflected outwardly to formcylindrical flanges, filler material interposed between said flanges andthe projecting ends of said core, the peripheral axial openings, saidend edges of said flanges being deflected radially inwardly against theouter face of said filler material to clamp such filler material at itsouter end against the end walls, the outer said end walls serving tolock said hub tongues against'said end walls.

3. A spool of the class described comprising a sheet metal hub, endwalls of sheet metahsecured to the hub ends concentric therewith, saidend walls having axial openings, a sheet lmetal core extending throughsaid hub and projecting through said open ings beyond said walls, saidend walls around said openings having flanges for engaging with saidcore and being spot-welded thereto, the peripheral sections of said endwalls being deflected outwardly to form cylindrical flanges, fillermaterial applied between said flanges and the projected ends of thecore, the peripheral sections of said flanges and said core beingdeflected against the outer faces of said filler material whereby suchmaterial is securely clamped in position.

4. A sheet metal spool comprising a hub bent into cylindrical form fromVsheet metal, tongues at the ends of said hub, end plates having slotstherethrough for receiving said tongues, said tongues after insertionthrough said slots being bent over against the outer faces of saidplates, said plates having axial openings, a core bent up of sheet metalextending through said hub and projecting through said plate openings adistance outwardly therefrom, each end plate having a ilange surroundingits opening and intimately receiving the respective end of said core,said flanges and core being spot-welded together, said end plates attheir outer section being deflected laterally to form 'cylindrical rims,a filler frame inserted within the rim of each end plate and receivingthe projecting end -ol the core, and means for securing said fillerframes to said end plates.

In witness whereof, I hereunto subscribe my name this 27th da of May, A.D. 1920.

' EB R J. HUBBARD.

